CVE-2026-85433: MOOS essential-moos pShare through 10.0.1 fails to properly authorize PSHARE_CMD messages, allowing any publis

Q: How do I fix CVE-2026-85433?

essential-moos: upgrade to newer than 10.0.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-85433 being exploited?

CVE-2026-85433 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-85433 affect?

CVE-2026-85433 affects essential-moos. Severity is critical (CVSS 9.8). MOOS essential-moos pShare through 10.0.1 fails to properly authorize PSHARE_CMD messages, allowing any publisher to reconfigure network routes and listeners at runtime. Attackers can send crafted PSHARE_CMD messages with cmd=output or cmd=

Q: How urgent is CVE-2026-85433?

Priority 61/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-85433 is a critical-severity flaw (CVSS 9.8) affecting essential-moos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

MOOS essential-moos pShare through 10.0.1 fails to properly authorize PSHARE_CMD messages, allowing any publisher to reconfigure network routes and listeners at runtime. Attackers can send crafted PSHARE_CMD messages with cmd=output or cmd=input parameters to open new listeners on arbitrary addresses and redirect or duplicate bus traffic to attacker-controlled destinations.

Why this priority

Critical severity
Public exploit reference
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 45%)
CISA exploited list	No
Weakness	CWE-862
Published	2026-09-03
Last modified	2026-10-14

Publisher (CNA): VulnCheck · Vendor: themoos

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-03 23:17 UTCPublished CVE record published
2026-10-14 15:14 UTCUpdated Record last modified

themoos essential-moos UPGRADE

Affected: <= 10.0.1

Fixed in: newer than 10.0.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy essential-moos || rpm -q essential-moos || essential-moos --version

2. UPGRADE to newer than 10.0.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade essential-moos

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade essential-moos

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Fedora 46 · ddnet · FIXED · 20.2-1.fc46 · FEDORA-2026-6991b4ab14 · source

sudo dnf upgrade --advisory=FEDORA-2026-6991b4ab14

Fedora ELN · libplacebo · FIXED · 7.360.1-5.eln159 · FEDORA-2026-92226f221e · source

sudo dnf upgrade --advisory=FEDORA-2026-92226f221e

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-85433?

essential-moos: upgrade to newer than 10.0.1. Exact commands for each OS are on this page.

Is CVE-2026-85433 being exploited?

CVE-2026-85433 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-85433 affect?

CVE-2026-85433 affects essential-moos. Severity is critical (CVSS 9.8). MOOS essential-moos pShare through 10.0.1 fails to properly authorize PSHARE_CMD messages, allowing any publisher to reconfigure network routes and listeners at runtime. Attackers can send crafted PSHARE_CMD messages with cmd=output or cmd=

How urgent is CVE-2026-85433?

Priority 61/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-85436 HIGH 7.5 UPGRADE MOOS essential-moos through 10.0.1 contains a buffer overflow vulnerability in CMOOSUDPLink::ReadPktFromArray(
CVE-2026-85431 HIGH 7.5 UPGRADE MOOS essential-moos through version 10.0.1 contains an unauthenticated UDP packet injection vulnerability in p
CVE-2026-85427 HIGH 8.1 UPGRADE MOOS essential-moos pAntler through 10.0.1 contains a remote code execution vulnerability that allows unauthen
CVE-2026-85430 CRITICAL 9.1 UPGRADE MOOS essential-moos through 10.0.1 contains an authentication bypass vulnerability in pShare that accepts UDP

References

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